From 1369b8ad31d5fff44af1a0f2b5fa8b24b4c24b09 Mon Sep 17 00:00:00 2001 From: Steve Holme Date: Thu, 20 Feb 2020 01:49:31 +0000 Subject: sha256: Added WinCrypt implementation Closed #5030 --- lib/sha256.c | 43 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) diff --git a/lib/sha256.c b/lib/sha256.c index a14f42aa3..352d577e8 100644 --- a/lib/sha256.c +++ b/lib/sha256.c @@ -192,6 +192,49 @@ static void SHA256_Final(unsigned char *digest, SHA256_CTX *ctx) (void) CC_SHA256_Final(digest, ctx); } +#elif defined(USE_WIN32_CRYPTO) + +#include + +typedef struct { + HCRYPTPROV hCryptProv; + HCRYPTHASH hHash; +} SHA256_CTX; + +#if !defined(CALG_SHA_256) +#define CALG_SHA_256 0x0000800c +#endif + +static void SHA256_Init(SHA256_CTX *ctx) +{ + if(CryptAcquireContext(&ctx->hCryptProv, NULL, NULL, + PROV_RSA_AES, CRYPT_VERIFYCONTEXT)) { + CryptCreateHash(ctx->hCryptProv, CALG_SHA_256, 0, 0, &ctx->hHash); + } +} + +static void SHA256_Update(SHA256_CTX *ctx, + const unsigned char *data, + unsigned int length) +{ + CryptHashData(ctx->hHash, (unsigned char *) data, length, 0); +} + +static void SHA256_Final(unsigned char *digest, SHA256_CTX *ctx) +{ + unsigned long length; + + CryptGetHashParam(ctx->hHash, HP_HASHVAL, NULL, &length, 0); + if(length == SHA256_DIGEST_LENGTH) + CryptGetHashParam(ctx->hHash, HP_HASHVAL, digest, &length, 0); + + if(ctx->hHash) + CryptDestroyHash(ctx->hHash); + + if(ctx->hCryptProv) + CryptReleaseContext(ctx->hCryptProv, 0); +} + #else /* When no other crypto library is available we use this code segment */ -- cgit v1.2.1